IFM Electronic Ecomat Mobile Series System Manual page 267

Controller functions in the ecomatmobile controller
If X > XS, the manipulated variable is increased.
If X < XS, the manipulated variable is reduced.
A reference variable is internally added to the manipulated variable.
Y = Y + 65,536 – (XS / XMAX * 65,536).
The manipulated variable Y has the following time characteristics.
y
KD
~T
V
Figure: Typical step response of a PID controller
Parameters of the function inputs
Name
X
XS
XMAX
KP
TN
KD
TV
SO
RESET
Parameters of the function outputs
Name
Y
ifm System Manual ecomatmobile
KI * X
d
KP * X
d
t
T
N
Data type Description
WORD Actual value
WORD Desired value
WORD Maximum value of the desired value
BYTE Constant of the Proportional component (/10)
TIME Reset time (Integral component)
BYTE Proportional component of the Differential component (/10)
TIME Derivative action time (Differential component)
BOOL Self-optimisation
BOOL Reset the function
Data type Description
WORD Manipulated variable
SmartController (CR2500) V05
Functions for controllers
267